-I was riding along the street and all of a sudden a car cut in and knocked me down.

问题补充：

---- I was riding along the street and all of a sudden, a car cut in and knocked me down.

---- You can never be careful in the street.

A. very

B. too

C. so

D. much

答案：

A. very

(答案→)B. too

C. so

D. much

解析：can never too+形容词“再……也不为过”。句意：--我在街上骑自行车时，突然一辆车插过来，把我撞到了。--你在街上无论怎么小心也不为过。故选B。